How Do I Tell My Parents I Have Super Powers? I Have Been Keeping It A Secret My Entire Childhood!?

Ok, I already realize I am going to have a lot of skeptics out there, but hopefully I will get some answers that take me seriously. My great uncle (dead) was a scientist and when I was 7, I was in his lab in the basement and accidentally fell into some of the formula. That is all i am willing to state here as I don’t want anyone finding out about this. Anyway, ever since this I have had powers. I have the ability to fly, zap people with my eyes, disappear, etc. and several other things. Although I was small, I never got picked on at school and it was pretty easy to get on the honor roll. No, I will not do anything magic for you so please don’t ask. i only use it for emergencies. However, I want to come out to my parents. My entire life, no one has known about my ability, but I am 18 now and I feel it is time to let my parents in on it. I’m scared though. What if they think I am a freak and inform the cops or something? I couldn’t imagine my life without super powers